Sliding-door lock.



H. JACKSON. SLIDING DOOR LOOK.

APPLICATION FILED JUNE 2, 1914.

Patented Dec. 29. 1914 Fig.1. 7

Hvwwtoz HWJQBKSUR/ llllllllll THE NORRIS PETERS CO., PHOTO-LITHO.,WASHINGTON Dv C.

UNITED srn'rns PATENT OFFICE.

HENRY JACKSON, OF LUDLOW, KENTUCKY, ASSIGNOR 0F C NE-HALF T0 LUCYLAUGHLIN, OF LUDLOW, KENTUCKY.

SLIDING-DOOR LOCK.

Specification of Letters Patent.

Patented Dec. 29, 1914:.

Application filed June 2, 1914. Serial No. 842,414.

To all whom it may concern:

Be it known that I, HENRY JACKSON, a citizen of the United States,residing at Ludlow, in the county of Kenton and State of Kentucky, haveinvented new and useful Improvements in Sliding-Door Locks, of which thefollowing is a specification.

This invention relates to improvements in locks and has particularapplication to a lock for use in conjunction with sliding doors, gatesand the like.

In carrying out the present invention, it is my purpose to provide alock which will be found especially useful in conjunction with slidingdoors, gates and the like and which will embody among other features apair of parallel jaws mounted within a casing and projecting outwardlyof one end wall thereof and having the inner ends thereof pivoted withinthe casing and the confronting edges at the outer ends thereof formedwith coacting lugs designed to engage a keeper and means holding thejaws normally against opening movement, means being provided forreleasing the holding means and simultaneously swinging the jaws to openposition so that the hasp engaged by the lugs will be released.

A further object of my invention is to provide a lock of the classdescribed which will embrace the desired features of simplicity,efficiency and durability, which may be manufactured and marketed at aminimum expense and which when installed will operate effectively underall conditions.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claims.

In the accompanying drawing; Figure 1 is a view in side elevation of asliding door lock constructed in accordance with the present invention.Fig. 2 is a longitudinal vertical sectional view through the lock. Fig.3 is a cross sectional view on the line 33 of Fig. 2. Fig. 4 is a viewin side elevation of the key controlling the lock.

Referring now to the drawing in detail, 1 designates a substantiallyrectangular casing.

In the present instance, fastening ears 2 project outwardly from one endwall and the opposite side walls of the casing whereby the latter may befastened to one side of a sliding door adjacent to the forward edgethereof. If desired, the securing lugs 2 may be illuminated and thecasing set into a mortise in the forward edge of the door.

The forward end of the casing, that is the end flush with the forwardedge of the door 1s formed with an opening 3 and disposed w thin thecasing and lying in parallelism wlth each other are jaws 1, 4cprojecting outwardly of the forward end of the casing by way of theopening 3 therein and havmg the confronting edges at the forward endsthereof cut away as at 5 and formed with inwardly extending noses 6.

The inner ends of the jaws l, 4 are mounted upon plvot pins 7 extendingtransversely of the casing and having the opposite ends thereof securedto the forward and rear walls of such casing. Normally, the confrontmgedges of the jaws 4, 4 engage each other and the adjacent ends of thenoses 6 obstruct the entrance to the space formed by the cut awayportions 5 of the jaws and in order to maintain the jaws in normalposition suitable tension means are employed. In the present instance,coiled expansion springs 8, 8 are interposed between the outer edges ofthe jaws and the adjacent edge wall of the casing, such springs actingupon the jaws to maintain the latter in normal position and restore thesame to such posltlon succeeding the swinging thereof about the pivotpins 7.

9 designates a keeper comprising a segmental casing 10 and a plate 11secured within the casing 10 at the open end thereof and closing suchend. This plate 11 is formed with a longitudinal slot 12 and arrangedtransversely of the slot approximately centrally thereof and secured tothe opposite side walls is a cross bar 13.

Secured to the curved end wall of the casing 10 adjacent to the oppositeends of such wall and projecting outwardly therefrom are securing lugs14, 14 whereby the casing may be fastened to the door jamb. If desired,the securing lugs 14 may be eliminated and the casing set into a mortiseformed in the door j amb.

In practice, the casing 1 of the lock mechanism is fastened to the outersurface of the door by means of the lugs 2 and the forward end of suchcasing, that is the end through which the jaws 4, 4 extend, lies flushwith the forward edge of the door, the doors and casing lying in ahorizontal plane. Similarly, the casing 10 is fastened to the outer sideof the jamb in a plane coincident with that of the casing 1 of the lockmechanism and the plate 11 closing the forward end of the casing liesflush with the adjacent abut- Inent face of the jamb. In this positionof the parts, the cross bar 13 within the slot 12 formed in the plate 11of the keeper 9 lies in the path of movement of the noses 6 on the outerends of the jaws 4 and when the door is slid to closed position thenoses 6 engage the cross bar 13 and in the continued movement of thedoor, such noses ride over the bar 13 and the inner edges thereof lockbehind the bar and are disposed within the casing 10, the springs 8permitting the jaws to swing open upon the noses engaging the cross barand forcing the jaws to closed position immediately that the noses passthe cross bar and are relieved of the influence thereof.

The confronting edges of the jaws 4, 4 are formed, approximatelycentrally thereof, with alining grooves registering with a keyhole 15formed in the front side wall of the casing 1. Projecting into thegrooves from the rear wall of the casing and alining axially with thecircular portion of the keyhole is a post 15 and rotatably mounted uponthe post 15 is an actuating cam 16 having the face thereof adjacent tothe keyhole formed with a depression 17 contiguous the post 15.

Mounted upon the bottom edge wall of the casing 1 and extending upwardlytherefrom are bearings 18 and slidably mounted within the bearings 18 isa horizontal bar 19 having the opposite ends thereof formed withupwardly projecting dogs 20, 20. A spring 21 has one end bearing uponthe rear end wall of the casing and the opposite end in engagement withthe confronting extremity of the bar 19 and acts to hold the barnormally at its limit of forward movement.

Connected with one side of the bar 19 and projecting upwardly therefromis an arm 22 having the upper end thereof formed with a notch anddisposed below and in proximity to the keyhole 15.

The bottom edge of the lower jaw 4 is formed with a recess 24 adapted toreceive the dog 20 on the forward end of the bar 19 when the latter isslid rearwardly within the casing against the action of the spring 21.

25 designates a key comprising a shank having one end thereof formedwith a longitudinal bore 26 and the opposite end equipped with a thumbpiece 27.

Formed integral with the end of the shank having the bore therein andprojecting outwardly therefrom parallel with the axis of the shank is alug 27 while extending laterally from the shank adjacent to the lug 27and at right angles thereto is a bit 28.

WVhen the jaws are in closed position the spring 21 holds the bar 19 atits limit of forward movement within the bearings 18 and the dogs 20 lieimmediately below the lower edge of the bottom jaw 4 and so preventmovement of the latter jaw relatively to the upper jaw. When it isdesired to relieve the lower jaw of the influence of the dogs 20 on thebar 19 and swing the jaws 4, 4 to open position so that the noses 6 willbe relieved of the influence of the cross bar 13 of the keeper wherebythe door may be moved to open position, the key 25 is inserted in thekeyhole 15 and the bore 26 of the key receives the post 15, while thelug 27 enters the notch 17 in the actuating cam 16 while the bit 28enters the recess 23 in the outer end of the arm 22. The key is nowrotated and in the movement of the bit 28, the bar 19 slides rearwardlywithin the casing against the action of the spring 21 thereby moving thedog 20 at the rear end of the bar behind the inner end of the lower jawand carrying the dog 20 at the forward end of the bar 19 into the planeof the recess 24 in the bottom edge of the lower j aw. Simultaneouslywith the sliding of the bar 19 to inactive position the lug 27 withinthe recess 17 in the actuating arm 16 revolves the latter about the post15 whereby the opposite ends of the cam engage the walls of the grooves14 in the confronting faces of the jaws and swing the latter to openposition against the action of the springs 8. The door may now be slidto open position. Succeeding the opening of the door the key is removedand the jaws are restored to normal locking position, while the bar 19slides to normal position under the action of the spring 21.

From the foregoing description taken in connection with the accompanyingdrawing, the construction, mode of operation and manner of employing myinvention will be readily apparent. It will be seen that I have provideda sliding door lock whereby the door will be effectively held againstopening movement and wherein the parts are so correlated and arranged asto reduce the possibility of derangement to a minimum.

The outer sides of the lock casing and keeper casing adjacent to theconfronting ends. thereof are preferably formed with lugs 29, 29 formedwith alining apertures adapted to receive a car seal when the jaws ofthe lock are within the hasp.

In order to hold the bar 19 against forward movement under the action ofthe spring succeeding the sliding of such bar under the action of thebit 28 of the key, a horizontal spring arm 30 has one end fixed to thelower pivot post 7 and the opposite extremity formed with a dependingtooth 31 disposed in the path of movement of the upper extremity of thearm 22 and adapted to enter the recess 23 in such arm when the bar 19 isslid rearwardly against the action of the spring 21. Extending upwardlyfrom the spring arm 30 is a vertical handle 32 having the upper endthereof equipped with an outwardly projecting knob 33 projecting througha slot formed in the front wall of the lock casing and capable ofsliding movement within such slot. By means of this construction, itwill be seen that when the bar 19 is moved rearwardly under the actionof the key the tooth 31 will enter the recess 23 in the arm 22 and sohold the bar 19 against forward movement. Thus, the lower jaw 4 is freeof the influence of the dogs 20, 20 and will swing to open position whenengaged by the bar 13 in the closing of the door. To disengage the dog31 from the recess 23 the knob 33 is elevated thereby swinging the dogend of the spring arm upwardly to release the arm 22.

I claim:

A sliding door lock comprising a casing,

jaws within said casing projecting out wardly of one end wall thereofand having the inner ends thereof pivoted within the casing and theconfronting edges at the outer ends thereof cut away and formed withcoacting noses, a bar within said casing below one of said jaws andcapable of sliding movement, a dog extending upwardly from said baradjacent to the rear. end thereof, an arm extending upwardly from thebar at the forward end thereof and cooperating with the dog, a springholding said bar normally in active position whereby said arm and dogengage the lower edge of the adjacent jaw to hold the latter againstmovement to open position, said arm having the upper end thereof formedwith a notch, a spring arm pivoted within the casing and having one endthereof formed with a depending tooth adapted to engage the notch insaid arm in the movement of the bar to release position to hold the baragainst forward movement under the action of said spring, and manualmeans for actuating said spring arm to lift the tooth thereon out ofengagement with the notch in said arm whereby the spring may react tothrow the bar to active position.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY JACKSON.

Witnesses:

DONALD CRIssINoER, J. E. FLEMING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

